tayloraswift · WolfDan · Mar 25, 2025
diff --git a/.github/workflows/Tests.yml b/.github/workflows/Tests.yml
@@ -2,39 +2,61 @@ name: tests
 
 on:
     push:
-        branches: [ master ]
+        branches: [master]
     pull_request:
-        branches: [ master ]
+        branches: [master]
 
 jobs:
     linux:
         runs-on: ubuntu-24.04
         name: Ubuntu 24.04
         steps:
-            -   name: Install Swift
-                uses: tayloraswift/swift-install-action@master
-                with:
-                    swift-prefix: "swift-6.0.3-release/ubuntu2404/swift-6.0.3-RELEASE"
-                    swift-id: "swift-6.0.3-RELEASE-ubuntu24.04"
+            - name: Install Swift
+              uses: tayloraswift/swift-install-action@master
+              with:
+                  swift-prefix: "swift-6.0.3-release/ubuntu2404/swift-6.0.3-RELEASE"
+                  swift-id: "swift-6.0.3-RELEASE-ubuntu24.04"
 
-            -   name: Checkout repository
-                uses: actions/checkout@v3
+            - name: Checkout repository
+              uses: actions/checkout@v3
 
-            -   name: Install imagemagick
-                run: sudo apt install -y imagemagick
+            - name: Install imagemagick
+              run: sudo apt install -y imagemagick
 
-            -   name: Run tests
-                run: Scripts/TestAll
+            - name: Run tests
+              run: Scripts/TestAll
+
+    linux-musl:
+        runs-on: ubuntu-24.04
+        name: Ubuntu 24.04
+        steps:
+            - name: Install Swift
+              uses: tayloraswift/swift-install-action@master
+              with:
+                  swift-prefix: "swift-6.0.3-release/ubuntu2404/swift-6.0.3-RELEASE"
+                  swift-id: "swift-6.0.3-RELEASE-ubuntu24.04"
+
+            - name: Checkout repository
+              uses: actions/checkout@v3
+
+            - name: Install imagemagick
+              run: sudo apt install -y imagemagick
+
+            - name: Install linux SDK
+              run: swift sdk install https://download.swift.org/swift-6.0.3-release/static-sdk/swift-6.0.3-RELEASE/swift-6.0.3-RELEASE_static-linux-0.0.1.artifactbundle.tar.gz --checksum 67f765e0030e661a7450f7e4877cfe008db4f57f177d5a08a6e26fd661cdd0bd
+
+            - name: Run tests
+              run: Scripts/TestAll -b "--swift-sdk x86_64-swift-linux-musl"
 
     macos:
         runs-on: macos-15
         name: macOS
         steps:
-            -   name: Checkout repository
-                uses: actions/checkout@v3
+            - name: Checkout repository
+              uses: actions/checkout@v3
 
-            -   name: Install imagemagick
-                run: brew install imagemagick
+            - name: Install imagemagick
+              run: brew install imagemagick
 
-            -   name: Run tests
-                run: Scripts/TestAll
+            - name: Run tests
+              run: Scripts/TestAll
diff --git a/Scripts/TestAll b/Scripts/TestAll
@@ -2,5 +2,28 @@
 set -e
 swift --version
 
-utils/tests
-utils/examples -c release
+DEFAULT_BUILD_FLAGS=""
+
+usage()
+{
+    echo "usage: Scripts/TestAll [OPTION...]
+    -b, --build-flags         swift build additional command flags, default '$DEFAULT_BUILD_FLAGS'"
+}
+
+build_flags=$DEFAULT_BUILD_FLAGS
+
+while [ "$1" != "" ] ; do
+    case $1 in
+    -b | --build-flags )
+        shift
+        build_flags=$1
+        ;;
+    * )
+        usage
+        exit 1
+    esac
+    shift
+done
+
+utils/tests -b "$build_flags"
+utils/examples -c release -b "$build_flags"
diff --git a/Sources/JPEGSystem/os.swift b/Sources/JPEGSystem/os.swift
@@ -6,8 +6,10 @@ import JPEG
 
 #if os(macOS)
     import Darwin
-#elseif os(Linux)
+#elseif canImport(Glibc)
     import Glibc
+#elseif canImport(Musl)
+    import Musl
 #elseif os(Android)
     import Android
 #else

diff --git a/utils/examples b/utils/examples
@@ -1,11 +1,13 @@
 #!/bin/bash
 DEFAULT_BUILD_CONFIGURATION="debug"
 SCRIPT_NAME="examples"
+DEFAULT_BUILD_FLAGS=""
 
 usage()
 {
     echo "usage: utils/$SCRIPT_NAME [OPTION...]
-  -c, --configuration       swift build configuration mode, default '$DEFAULT_BUILD_CONFIGURATION'"
+  -c, --configuration       swift build configuration mode, default '$DEFAULT_BUILD_CONFIGURATION'
+  -b, --build-flags         swift build additional command flags, default '$DEFAULT_BUILD_FLAGS'"
 }
 
 error()
@@ -23,21 +25,26 @@ check()
 }
 
 build_configuration=$DEFAULT_BUILD_CONFIGURATION
+build_flags=$DEFAULT_BUILD_FLAGS
 
 while [ "$1" != "" ] ; do
     case $1 in
     -c | --configuration )
         shift
         build_configuration=$1
         ;;
+    -b | --build-flags )
+        shift
+        build_flags=$1
+        ;;
     * )
         usage
         exit 1
     esac
     shift
 done
 
-swift build -c $build_configuration
+swift build -c $build_configuration $build_flags
 
 # run `DecodeBasic` example
 check   "error: runtime error" \

diff --git a/utils/fuzz-test b/utils/fuzz-test
@@ -2,11 +2,13 @@
 DEFAULT_BUILD_CONFIGURATION="debug"
 DEFAULT_COUNT="16"
 DEFAULT_PREFIX="tests/fuzz/data"
+DEFAULT_BUILD_FLAGS=""
 
 usage()
 {
     echo "usage: utils/fuzz-test [OPTION...]
   -c, --configuration       swift build configuration mode, default '$DEFAULT_BUILD_CONFIGURATION'
+  -b, --build-flags         swift build additional command flags, default '$DEFAULT_BUILD_FLAGS'
   -n, --count               number of 8x8 test jpegs to generate, default $DEFAULT_COUNT
   -p, --prefix              directory to write test images to, default '$DEFAULT_PREFIX'"
 }
@@ -36,6 +38,7 @@ fi
 prefix=$DEFAULT_PREFIX
 count=$DEFAULT_COUNT
 build_configuration=$DEFAULT_BUILD_CONFIGURATION
+build_flags=$DEFAULT_BUILD_FLAGS
 
 JPEG_DIRECTORY_NAME="jpeg"
 YCC_DIRECTORY_NAME="ycc"
@@ -48,6 +51,10 @@ while [ "$1" != "" ] ; do
         shift
         build_configuration=$1
         ;;
+    -b | --build-flags )
+        shift
+        build_flags=$1
+        ;;
     -n | --count )
         shift
         count=$1
@@ -67,9 +74,9 @@ jpeg_pattern=$prefix/*.$JPEG_EXTENSION
 ycc_pattern=$prefix/*.$YCC_EXTENSION
 
 check   "error: swift build failed" \
-        swift build -c $build_configuration --product JPEGFuzzer
+        swift build -c $build_configuration --product JPEGFuzzer $build_flags
 check   "error: swift build failed" \
-        swift build -c $build_configuration --product JPEGComparator
+        swift build -c $build_configuration --product JPEGComparator $build_flags
 
 binaries=".build/$build_configuration"
 if ! [ -f $binaries/JPEGFuzzer ]; then

diff --git a/utils/integration-test b/utils/integration-test
@@ -1,11 +1,13 @@
 #!/bin/bash
 DEFAULT_BUILD_CONFIGURATION="debug"
 TOOL_NAME="JPEGIntegrationTests"
+DEFAULT_BUILD_FLAGS=""
 
 usage()
 {
     echo "usage: utils/$TOOL_NAME [OPTION...]
-  -c, --configuration       swift build configuration mode, default '$DEFAULT_BUILD_CONFIGURATION'"
+  -c, --configuration       swift build configuration mode, default '$DEFAULT_BUILD_CONFIGURATION'
+  -b, --build-flags         swift build additional command flags, default '$DEFAULT_BUILD_FLAGS'"
 }
 
 error()
@@ -23,13 +25,18 @@ check()
 }
 
 build_configuration=$DEFAULT_BUILD_CONFIGURATION
+build_flags=$DEFAULT_BUILD_FLAGS
 
 while [ "$1" != "" ] ; do
     case $1 in
     -c | --configuration )
         shift
         build_configuration=$1
         ;;
+    -b | --build-flags )
+        shift
+        build_flags=$1
+        ;;
     * )
         usage
         exit 1
@@ -38,7 +45,7 @@ while [ "$1" != "" ] ; do
 done
 
 check   "error: swift build failed" \
-        swift build -c $build_configuration --product $TOOL_NAME
+        swift build -c $build_configuration --product $TOOL_NAME $build_flags
 
 binaries=".build/$build_configuration"
 if ! [ -f $binaries/$TOOL_NAME ]; then

diff --git a/utils/regression-test b/utils/regression-test
@@ -1,11 +1,13 @@
 #!/bin/bash
 DEFAULT_BUILD_CONFIGURATION="debug"
 TOOL_NAME="JPEGRegressionTests"
+DEFAULT_BUILD_FLAGS=""
 
 usage()
 {
     echo "usage: utils/$TOOL_NAME [OPTION...]
   -c, --configuration       swift build configuration mode, default '$DEFAULT_BUILD_CONFIGURATION'
+  -b, --build-flags         swift build additional command flags, default '$DEFAULT_BUILD_FLAGS'
   -u, --update              remove and regenerate golden outputs (tests will fail)"
 }
 
@@ -24,13 +26,18 @@ check()
 }
 
 build_configuration=$DEFAULT_BUILD_CONFIGURATION
+build_flags=$DEFAULT_BUILD_FLAGS
 
 while [ "$1" != "" ] ; do
     case $1 in
     -c | --configuration )
         shift
         build_configuration=$1
         ;;
+    -b | --build-flags )
+        shift
+        build_flags=$1
+        ;;
     -u | --update )
         shift
         gold=(tests/regression/gold/*.jpg.ycc)
@@ -51,7 +58,7 @@ while [ "$1" != "" ] ; do
 done
 
 check   "error: swift build failed" \
-        swift build -c $build_configuration --product $TOOL_NAME
+        swift build -c $build_configuration --product $TOOL_NAME $build_flags
 
 binaries=".build/$build_configuration"
 if ! [ -f $binaries/$TOOL_NAME ]; then

diff --git a/utils/tests b/utils/tests
@@ -1,6 +1,29 @@
 #!/bin/bash
+SCRIPT_NAME="tests"
+DEFAULT_BUILD_FLAGS=""
 
-utils/unit-test                     || exit 1
-utils/integration-test -c release   || exit 1
-utils/regression-test -c release    || exit 1
-utils/fuzz-test -c release -n 16    || exit 1
+usage()
+{
+    echo "usage: utils/$SCRIPT_NAME [OPTION...]
+    -b, --build-flags         swift build additional command flags, default '$DEFAULT_BUILD_FLAGS'"
+}
+
+build_flags=$DEFAULT_BUILD_FLAGS
+
+while [ "$1" != "" ] ; do
+    case $1 in
+    -b | --build-flags )
+        shift
+        build_flags=$1
+        ;;
+    * )
+        usage
+        exit 1
+    esac
+    shift
+done
+
+utils/unit-test -b "$build_flags"                     || exit 1
+utils/integration-test -c release -b "$build_flags"   || exit 1
+utils/regression-test -c release -b "$build_flags"    || exit 1
+utils/fuzz-test -c release -n 16 -b "$build_flags"    || exit 1
diff --git a/utils/unit-test b/utils/unit-test
@@ -1,5 +1,8 @@
 #!/bin/bash
 TOOL_NAME="JPEGUnitTests"
+SCRIPT_NAME="unit-test"
+DEFAULT_BUILD_FLAGS=""
+
 error()
 {
     echo $1
@@ -14,8 +17,29 @@ check()
     "$@" || error "$message"
 }
 
+usage()
+{
+    echo "usage: utils/$SCRIPT_NAME [OPTION...]
+    -b, --build-flags         swift build additional command flags, default '$DEFAULT_BUILD_FLAGS'"
+}
+
+build_flags=$DEFAULT_BUILD_FLAGS
+
+while [ "$1" != "" ] ; do
+    case $1 in
+    -b | --build-flags )
+        shift
+        build_flags=$1
+        ;;
+    * )
+        usage
+        exit 1
+    esac
+    shift
+done
+
 check   "error: swift build failed" \
-        swift build -c release --product $TOOL_NAME
+        swift build -c release --product $TOOL_NAME $build_flags
 
 binaries=".build/release"
 if ! [ -f $binaries/$TOOL_NAME ]; then